Digital clock



FIG. 1 is a front and top-right perspective view of a digital clockshowing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view of FIG. 2;

FIG. 4 is a bottom plan view of FIG. 2;

FIG. 5 is a right side elevational view of FIG. 2;

FIG. 6 is a left side elevational view of FIG. 2; and

FIG. 7 is a rear elevational view of FIG. 2.

The ornamental design for a digital clock, as shown and described.